The “Nothing Compares 2 U” singer, 48, went for a bike ride in the Chicago suburb of Willmette early Sunday afternoon and hasn’t been seen since, reports TMZ.

O’Connor was last seen on a motorized bike with a pink basket dressed in a black parka, black leather bands and an Ireland sweatshirt, according to the website. She was reportedly classified as “missing suicidal” in the alert released by police.